ProgramNode(0...17)(
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       :a,
       0,
       RescueModifierNode(4...17)(
         CallNode(4...8)(
           nil,
           nil,
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           (5...6),
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           0,
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         ),
         (9...15),
         IntegerNode(16...17)()
       ),
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       (2...3)
     )]
  )
)
